Raymond Demetrius Howard, 20, was arrested on July 3 at his home in Long Beach. (Credit: Long Beach Police)

Police in Long Beach and Signal Hill were searching for possible additional victims of a man charged Tuesday in connection with two sexual assault cases.

Raymond Demetrius Howard, 20, was arrested on July 3 at his home in Long Beach.

He was charged on Tuesday with assault with a deadly weapon, mayhem, attempted human trafficking, robbery, criminal threats, rape, and other sexual assault related charges, according to a news release from the Long Beach Police Department.

Howard was being held on $5,650,000 bail.

The investigation began on June 29 when Long Beach officers found a 31-year-old victim who had been beaten and sexually assaulted in an alley near Del Amo and Long Beach Boulevards, the release stated.

Police believed the attacker had followed the victim from a nearby bus depot.

During their investigation, detectives learned that the Signal Hill Police Department was investigating a sexual assault with a similar suspect description, the release stated.

In both cases, it was believed the attacker used a handgun to assault the victims.

Investigators believe there may be additional victims who have never contacted police. Anyone with information was urged to contact Detective Luis Galvan at 562-570-6407.